Liquid receiver combined with liquid separator for refrigeration cycle and manufacturing method thereof

ABSTRACT

The present invention relates to a liquid receiver combined with a liquid separator for a refrigeration cycle and a manufacturing method thereof; and more particularly, to a liquid receiver combined with a liquid separator for a vapor-compression refrigeration cycle and a manufacturing method thereof, by which manpower and working hours are reduced and the defect rate is reduced, thereby improving the productivity. The present invention comprises: a liquid separator ( 20 ), which includes a cover ( 21 ) with a cut portion of a refrigerant vapor suction conduit ( 18 ) and a cut portion of a refrigerant conduit ( 17 ) connected at the inside and outside thereof, respectively, facing each other, a cylindrical body ( 24 ) with the upper end coupled to the cover ( 21 ) in such a manner to surround the refrigerant vapor suction conduit ( 18 ), and a base plate ( 25 ) formed at the lower end of the cylindrical body ( 24 ); a liquid receiver ( 30 ), which has a main body ( 31 ) with the upper end being coupled to both ends of the cover, and a side wall ( 32 ) with an outlet opening ( 33 ) formed therein; and a heat pipe ( 40 ), which includes a plurality of main bodies ( 41 ) weld-bonded to the base plate ( 25 ) of the liquid separator, an evaporator ( 42 ) weld-bonded to the inside of the main body ( 31 ) of the liquid receiver, a condenser ( 43 ) weld-bonded to the inside of the liquid separator ( 20 ), and an exhaust pipe combined with a working fluid injection pipe ( 44 ) connected to the lower end of the main body ( 41 ) of each heat pipe in such a way to allow the heat pipe main bodies ( 41 ) to get interconnected in a communicating manner, whereby after a working fluid is injected to the heat pipe main bodies ( 41 ) an entrance of the exhaust pipe combined with the working fluid injection pipe ( 44 ) is cut and closed and the closure is then pushed inside the outlet opening ( 33 ).

TECHNICAL FIELD

The present invention relates to a liquid receiver combined with aliquid separator for a refrigeration cycle and a manufacturing methodthereof, and in particular to a liquid receiver combined with a liquidseparator for a vapor compression refrigeration cycle and amanufacturing method thereof.

BACKGROUND ART

A refrigeration cycle generally applied to both a refrigerator and aheat pump works in details on a compressor, a 4-way valve, an indoorheat exchanger, an expansion valve and an outdoor heat exchanger whichare sequentially interconnected through refrigerant conduits. The 4-wayvalve and the compressor are connected by a refrigerant vapor suctionconduit. In the mode of the refrigerator, a high temperature and highpressure refrigerant vapor compressed by the compressor is condensedpassing through the outdoor heat exchanger, and the refrigerant liquidis evaporated passing through the indoor heat exchanger, thevaporization heat generated during which is used to generaterefrigeration effects. The low temperature and pressure refrigerationvapor evaporated passing through the indoor heat exchanger passesthrough the suction conduit and is inputted into the compressor. In themode of the heat pump, a high temperature and high pressure refrigerantvapor compressed by the compressor is condensed passing through theindoor heat exchanger, the condensation heat generated during which isused to generate heating effects. The refrigeration liquid condensed bythe indoor heat exchanger is evaporated passing through the outdoor heatexchanger, and the evaporated refrigerant vapor is inputted into thecompressor through a refrigerant suction conduit.

The refrigeration cycle additionally needs, as accessory devices, aliquid receiver generally installed at an outlet (a high pressure side)of the indoor heat exchanger or the outdoor heat exchanger whichrespectively operates as a condenser, and a liquid separator generallyinstalled at an outlet (a low pressure side) of the indoor heatexchanger or the outdoor heat exchanger which respectively operates asan evaporator. The liquid receiver serves to temporarily store a hightemperature and high pressure refrigeration liquid condensed by thecondenser, thus smoothly supplying refrigerant to the evaporator evenwhen a refrigeration work load or a heating work load changes. Theliquid separator serves to prevent the refrigeration liquid frominputting into the compressor, thus preventing the damages of thecompressor which might occur owing to a liquid back phenomenon and aliquid hammer phenomenon both occurring during liquid compressions.

In the above refrigeration cycle, when the refrigerant is supplied tothe evaporator by the amount needed in the course of the vaporization inthe evaporator after it is properly adjusted by the expansion valve, therefrigerant could remain in a dry-saturated vapor state; however whenthe amount of the refrigerant adjusted by the expansion valve exceedsthe optimum amount of the refrigerant evaporated as it passes throughthe evaporator, the vaporization efficiency becomes poor as therefrigeration load decreases, and the separation of the refrigerantvapor and the refrigerant liquid could not be properly conducted. Inthis event, the refrigerant liquid might be inputted into thecompressor, thus causing a compressor damage prevention function not toproperly work.

The same applicant as the present invention's applicant filed a liquidreceiver combined with a liquid separator for a heat pump system(hereinafter referred to Korean patent document 1) after an applicant'slong time research in an attempt to overcome the above technicalproblems.

The liquid receiver combined with a liquid separator for a heat pumpsystem disclosed in the Korean patent document 1 is characterized inthat a liquid receiver combined with a liquid separator is connectedbetween an indoor heat exchanger or an outdoor heat exchanger(condenser) and an outdoor heat exchanger or an indoor heat exchanger(evaporator) of a refrigerant conduit, and a liquid separator isconnected in the middle of the refrigerant suction conduit, and aworking fluid such as distilled water, alcohol, or the like isvacuum-filled into a liquid receiver combined with a liquid separator,thus constituting a plurality of heat pipes which consequently serve torepeatedly perform vaporization and condensation cycles, with anevaporator being secured at a liquid receiver, a condenser being securedat a liquid separator.

The liquid receiver combined with a liquid separator for a heat pumpsystem is characterized in that when a refrigeration cycle is applied toa refrigerator or a heat pump, a high temperature and high pressurerefrigerant liquid condensed by an outdoor heat exchanger or an indoorheat exchanger (condenser) is inputted into a liquid receiver, thusheating an evaporator of a heat pipe, so the working fluid inputted intothe interior is evaporated, and the refrigerant liquid is over cooled,and the working liquid evaporated by the evaporator moves to thecondenser.

The wet-saturated refrigerant vapor evaporated by the indoor heatexchanger or the outdoor heat exchanger (evaporator) is inputted intothe liquid separator when it is sucked into the compressor through therefrigerant suction conduit and is heated by the heat radiation of theworking fluid evaporated toward the condenser of the heat pipe and isconverted to a dry-saturated refrigerant vapor or an over-heatedrefrigerant vapor and is inputted into the compressor. The working fluidcondensed by the condenser moves downward toward the evaporator, andthen is re-evaporated, the cycle of which is repeatedly performed.

The liquid receiver combined with a liquid separator for a heat pumpsystem of the Korean patent document 1 with a simple construction isbasically directed to enhancing a performance coefficient as arefrigerant liquid condensed by an outdoor heat exchanger or an indoorheat exchanger is over cooled, and a wet-saturated refrigerant vaporsucked into the compressor is dry-saturated or over evaporated, whichresults in effectively preventing both a liquid back phenomenon and aliquid hammer phenomenon in a compressor, thus manufacturing a reliablecompressor.

Korean Patent Document 1: KR 10-0484243(B1)

The conventional liquid receiver combined with a liquid separator for aheat pump system has some advantages that it has a simple construction,and a refrigerant liquid of a refrigeration cycle is over cooled, and awet-saturated refrigerant vapor is dry-saturated or overheat evaporated;however in the conventional liquid receiver combined with a liquidseparator for a heat pump system has the disadvantages that a highpressure part and a low pressure part (a high temperature and highpressure refrigerant liquid and a low temperature and pressurerefrigerant vapor) is welded in an attempt to prevent leakage betweenthe same. As the heat pipe is fixedly secured at a lower surface of theliquid separator by a welding method, a working fluid is over expandedin the event that a working fluid is previously vacuum injected into aheat pipe, thus damaging the heat pipe which results in making theoperation impossible.

Alternatively, when the heat pipes are welded to the lower surface ofthe liquid separator, it is proposed that the bodies of the heat pipesare first welded, and then a working fluid is vacuum injected into eachheat pipe body. In this event, the number of work processes and worktime significantly increase, so the manufacture of the system inevitablycosts a lot.

What a plurality of heat pipe bodies are fixedly welded at regularintervals to a lower surface of the liquid separator, and then workingfluid is vacuum injected into each heat pipe body, is same as a liquidseparator and a liquid receiver secured to each heat pipe body areseparately manufactured, and then a working fluid is injected into eachheat pipe body. So, when a working fluid is vacuum injected into a heatpipe body or a liquid receiver is welded to a liquid separator, lots ofdefective products are manufactured due to the damages of the heat pipesfilled with working liquid. Since careful works are needed forpreventing the damages of the heat pipes, productivity lowers, and themanufacture of the products costs a lot.

DISCLOSURE OF INVENTION

Accordingly, it is an object of the present invention to provide aliquid receiver combined with a liquid separator for a refrigerationcycle and a manufacturing method thereof which make it possible tosignificantly reduce the number of work processes and work time as wellas defective products, thus significantly enhancing productivity.

To achieve the above objects, there is provided a liquid receivercombined with a liquid separator for a refrigeration cycle whichcomprises a liquid separator formed in such a way that a refrigerantvapor suction conduit and a refrigerant conduit are cut, and therefrigerant vapor suction conduit is extended into a cover at an innerside of the cover, and the refrigerant conduit is extended into thecover at an outer side of the cover, and an upper side of a liquidseparator cylinder body is secured to the cover in such a way tosurround the refrigerant vapor suction conduit, and a liquid separatorlower plate is formed at a lower side of the liquid separator cylinderbody; and a liquid receiver formed in such a way that an upper side ofthe liquid receiver body is secured to both sides of the cover, and anoutlet is formed at a side wall, wherein a plurality of heat pipe bodiesare welded to the liquid separator lower plate, respectively, and theevaporator is disposed in the liquid receiver body, and the condenser isdisposed in the liquid separator, and the exhaust conduit-combinedworking fluid injection conduit is secured to the lower side of the heatpipe bodies, thus making the heat pipe bodies to communicate with eachother, and an inlet portion of the exhaust conduit-combined workingfluid injection conduit is cut and closed after a working fluid isinjected into the heat pipe bodies, respectively, and then the closedportion is pushed into the inner side of the outlet hole.

To achieve the above objects, there is provided a manufacturing methodof a liquid receiver combined with a liquid separator for arefrigeration cycle which comprises a liquid separator semi-finishedproduct manufacture step in which a refrigerant vapor suction conduitand a refrigerant conduit are cut, and the refrigerant vapor suctionconduit is extended into a cover at an inner side of the cover, and therefrigerant conduit is extended into the cover at an outer side of thecover, and an upper side of a liquid separator cylinder body is securedto the cover in such a way to surround the refrigerant vapor suctionconduit; a heat pipe manufacture step in which a center of each heatpipe body is fixedly secured to a liquid separator lower plate, and anexhaust conduit-combined working liquid injection conduit is connectedto a lower side of each heat pipe body in such a way to make the heatpipe bodies to communicate with each other; a step in which a liquidseparator lower plate to which the heat pipe is fixed is secured to alower side of the liquid separator cylinder body, and a condenser ofeach heat pipe body is dispose in the liquid separator cylinder body; astep in which an upper side of the liquid receiver body with an outlethole at a side wall is secured to both sides of the cover, and theexhaust conduit-combined working fluid injection conduit is extendedthrough the outlet hole; and a step in which a vacuum generation meansis secured to the exhaust conduit-combined working fluid injectionconduit, thus vacuuming the heat pipes, and a working fluid is injectedinto the heat pipe bodies, respectively, and an inlet side of theexhaust conduit-combined working fluid injection conduit is closed, andthe closed inlet side is pushed into the interior of the liquid receiverbody, and then the outlet hole is closed.

Advantageous Effects

The liquid receiver combined with a liquid separator for a refrigerationcycle according to the present invention is advantageously characterizedin that a liquid receiver is secured to a liquid separator, and aplurality of heat pipe bodies are secured to a lower surface of theliquid separator, and a working liquid is concurrently injected into aplurality of heat pipe bodies through a working fluid injection conduitalso functioning as an exhaust conduit, so the number of work processesand work time can be significantly reduced. Since a working fluid isinjected into a plurality of heat pipes, respectively, through a workingfluid injection conduit also functioning as an exhaust conduit after thewhole construction is assembled in a state that a working fluid is notinjected into heat pipe bodies, so it is possible to protect the heatpipe bodies from damages, which results in lowering defects, whereby toreduce the number of work processes and work time for thereby savingmanufacture cost.

The method for manufacturing a liquid receiver combined with a liquidseparator for a refrigeration cycle according to the present inventionis advantageously characterized in that the whole construction of aliquid receiver combined with a liquid separator is assembled in a statethat a working liquid is not injected in a heat pipe body, and then aworking fluid is concurrently injected into each heat pipe body, thusreducing the damages of heat pipe bodies and defects in the products. Asa working fluid can be concurrently injected into multiple heat pipebodies, the number of work processes and work time can be significantlysaved for thereby enhancing productivity and saving manufacture cost.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become better understood with reference tothe accompanying drawings which are given only by way of illustrationand thus are not limitative of the present invention, wherein;

FIG. 1 is a cross sectional view illustrating an embodiment of thepresent invention;

FIG. 2 is a view illustrating a construction before a working liquid isinjected into a heat pipe body according to an embodiment of the presentinvention;

FIG. 3 is a flow chart of a manufacturing process according to anembodiment of the present invention; and

FIG. 4 is a view of an installation example according to an embodimentof the present invention.

MODES FOR CARRYING OUT THE INVENTION

FIG. 1 is a cross sectional view illustrating an embodiment of thepresent invention, and FIG. 2 is a view illustrating a constructionbefore a working liquid is injected into a heat pipe body according toan embodiment of the present invention, and FIG. 3 is a flow chart of amanufacturing process according to an embodiment of the presentinvention, and FIG. 4 is a view of an installation example according toan embodiment of the present invention. The present invention comprisesa liquid separator 20, a liquid receiver 30 and heat pipes 40.

The liquid separator 20 is manufactured in such a way that a refrigerantvapor outlet conduit 22 b is welded at an arc shaped cover 21 in ahooked shape, and a middle portion of a refrigerant vapor suctionconduit 18 is cut, thus forming a refrigerant vapor inlet conduit 22 aat a portion opposite to the refrigerant vapor outlet conduit 22 b. Amiddle portion of a refrigerant conduit 17 is cut, thus forming oppositerefrigerant outlet and inlet conduits 23 a and 23 b, respectively, atthe outer portions of the refrigerant vapor inlet conduit 22 a and therefrigerant vapor outlet conduit 22 b. In addition, the upper end of aliquid separator cylinder body 24 is welded to an inner side of thecover 21 in such a way to surround the refrigerant vapor inlet conduit22 a and the refrigerant vapor outlet conduit 22 b, and a liquidseparator lower plate 25 is welded to a lower side of the liquidseparator cylinder body 24.

Here the liquid receiver 30 is manufactured in such a way that theliquid receiver body 31 is formed to have a U-shaped cross section, andan upper side of a side wall 32 of the same is welded to the cover 21,and an outlet hole 33 of the exhaust conduit-combined working fluidinjection conduit 44 is formed at the side wall 32, and a working fluidsuch as distilled water, alcohol or the like circulating through thevaporization and condensation cycles is injected into the heat pipe body41 and is blocked by a plug 34.

The heat pipe 40 is welded so that a plurality of heat pipe bodies 41(in which a working fluid is not yet filled) are disposed at the liquidseparator lower plate 25, and the evaporator 42 is disposed in theliquid receiver body 31, and the condenser 43 is disposed in the liquidseparator cylinder body 24. The exhaust conduit-combined working fluidinjection conduit 44 is connected to the lower side of each heat pipebody 41 in such a way to communicate with each other. A working fluid isfilled into the heat pipe body 41, and the inlet of the exhaustconduit-combined working fluid inlet conduit 44 is blocked and insertedinto the outlet hole 33 and is placed around the inner side.

The inlet portion of the exhaust conduit-combined working 44 is formedin a spiral shape for making the same freely flexible, so it is possibleto more easily extract through the inlet hole 33 formed at the side wall32 of the liquid receiver body 31 during the assembly. With the aid ofthe above construction, it is easier to insert the inlet side of theexhaust conduit-combined working fluid injection conduit 44 into theliquid receiver body 31 after a working fluid is filled into the heatpipe body 41.

An exhaust conduit 45 a and a working fluid injection branch conduit 45b are disposed at the inlet side of the exhaust conduit-combined workingfluid injection conduit 44, and valves 46 a and 46 b are installed. Thevalve 46 a is opened, and a vacuum generator is connected to the exhaustconduit 45 a, and the interior of the heat pipe body 41 is made vacuum,and the valve 46 b is opened, and then a working fluid is injected intothe heat pipe body 41, so a working fluid can be fast injected into theheat pipe body 41.

As shown in FIG. 4, in the preferred embodiment of the presentinvention, reference character 10 represents a vapor compression typerefrigeration cycle, 11 represents a compressor, 12 represents a 4-wayvalve, 13 represents an indoor heat exchanger, 14 a and 14 b representexpansion valves, respectively, 15 a and 15 b represent check valves,respectively, 16 represents an outdoor heat exchanger and 47 representsa fin.

The liquid receiver combined with a liquid separator according to thepresent invention is, in terms of its operation, characterized in thatas a refrigeration cycle works on in the mode of either a refrigeratoror a heat pump, a high temperature and high pressure refrigerant liquidcondensed by either the outdoor heat exchanger 16 or the indoor heatexchanger 13 is inputted into the liquid receiver 30, thus heating theevaporator 42 of the heat pipe body 41, so the working fluid injectedinto the interior evaporates, and the refrigerant liquid is over cooled,and the working fluid evaporated passing though the evaporator 42 movestoward the condenser 43.

The wet-saturated refrigerant vapor evaporated as refrigerant liquidpasses through the indoor heat exchanger 13 or the outdoor heatexchanger 16 is sucked into the compressor 11 through the refrigerantsuction conduit 18, and at the same time is inputted into the liquidseparator 20. The refrigerant is heated by a working fluid evaporatedtoward the condense 43 of the heat pipe body 41 and is converted into adry-saturated refrigerant vapor or an overheated refrigerant vapor andis sucked into the compressor 11, and the working fluid condensedpassing through the condenser 43 moves toward the evaporator 42, and isre-evaporated, the cycle of which is repeatedly performed.

The liquid receiver combined with a liquid separator according to thepresent invention is characterized in that a liquid separator is securedto a liquid receiver, and a plurality of heat pipe bodies are fixedlysecured to a lower plate of the liquid separator, and an exhaustconduit-combined working fluid injection conduit is connected to eachheat pipe in such a way to make each heat pipe body to communicate witheach other. A working fluid is concurrently vacuum-injected into eachheat pipe body, thus significantly reducing the number of work processesand work time. The whole construction is assembled in a state that aworking fluid is not filled in the heat pipe bodies, and then a workingfluid is filled into the heat pipe bodies, respectively, through anexhaust conduit-combined working fluid injection conduit, thussubstantially eliminating the damages of heat pipe bodies, whereby tominimize defects, and the number of work processes and work time can beminimized for thereby maximizing the productivity and saving manufacturecosts.

The method for manufacturing a liquid receiver combined with a liquidseparator for a refrigeration cycle according to the present inventionwill be described.

Step for Manufacturing Semi-Finished Liquid Separator

A refrigerant vapor outlet conduit 22 b is welded at an arc shaped cover21 in a hooked shape, and a middle portion of a refrigerant vaporsuction conduit 18 is cut, thus forming a refrigerant vapor inletconduit 22 a at a portion opposite to the refrigerant vapor outletconduit 22 b. A middle portion of a refrigerant conduit 17 is cut, thusforming opposite refrigerant outlet and inlet conduits 23 a and 23 b,respectively, at the outer portions of the refrigerant vapor inletconduit 22 a and the refrigerant vapor outlet conduit 22 b. In addition,the upper end of a liquid separator cylinder body 24 is welded to aninner side of the cover 21 in such a way to surround the refrigerantvapor inlet conduit 22 a and the refrigerant vapor outlet conduit 22 b.

Step for Manufacturing Heat Pipes

Approximately middle portions of a plurality of heat pipe bodies(not yetfilled with a working fluid) are fixedly welded at a liquid separatorlower plate 25, and the exhaust conduit-combined with working fluidinjection conduit 44 is connected to a lower side of the heat pipebodies 41, respectively, in such a way to make the heat pipe bodies 41to communicate with each other. The inlet portion of the exhaustconduit-combined working fluid injection conduit 44 is made in a spiralshape for thereby making the same freely flexible, and the exhaustconduit 45 a and the working liquid injection branch conduit 45 b areformed, thus installing the valves 46 a and 46 b.

Step for Interconnecting Heat Pipes to Liquid Separator Cylinder Body

The liquid separator lower plate 25 to which the heat pipes 40 are fixedis welded at a lower side of the liquid separator cylinder body 24, andthe condenser 43 of the heat pipe bodies 41 is welded to be disposed inthe liquid separator cylinder body 24.

Step for Interconnecting Liquid Receiver Body to Liquid Separator Cover

The liquid receiver body 31 has a U-shaped cross section, thusmanufacturing a liquid receiver 30 formed of an outlet hole 33 of theexhaust conduit-combined working fluid injection conduit 44 at the sideall 32, and the upper side of the liquid receiver body 31 is welded toboth sides of the cover 21, and the exhaust conduit 45 a and the workingfluid injection branch conduit 45 b formed at the inlet side of theexhaust conduit-combined working fluid injection conduit 44 are extendedthrough the outlet hole 33.

Step for Injecting Working Fluid into Heat Pipes

A vacuum generation means(not shown) is connected to the exhaust conduit45 a, and the valve 46 a is opened, thus vacuuming the heat pipes 40,and then the valve 46 a is closed. A working fluid string tank(notshown) is connected to the working fluid injection branch conduit 45 b,and the valve 46 b is opened, and a working fluid is fast injected intothe heat pipes 40, and the inlet sides of the exhaust conduit-combinedworking fluid injection conduit 44 are cut and closed, and the closedpart is pushed into the liquid receiver body 31, and the outlet hole 33is closed by the plug 34 and is welded.

As described above, the method for manufacturing a liquid receivercombined with a liquid separator according to the present invention ischaracterized in that the whole construction of the liquid receivercombined with a liquid separator is assembled in a state that a workingfluid is not yet filled in the heat pipe bodies. A working fluid isconcurrently injected into each heat pipe body through the exhaustconduit-combined working fluid injection conduit, thus eliminating thedamages of the heat pipe bodies, which results in decreasing defects.Since a working fluid is fast, concurrently injected into a plurality ofheat pipes, the number of work processes and work time are significantlyreduced, so productivity is enhanced, and manufacture cost is minimized.

1. A liquid receiver combined with a liquid separator for arefrigeration cycle, comprising: a liquid separator formed in such a waythat a refrigerant vapor suction conduit and a refrigerant conduit arecut, and the refrigerant vapor suction conduit is extended into a coverat an inner side of the cover, and the refrigerant conduit is extendedinto the cover at an outer side of the cover, and an upper side of aliquid separator cylinder body is secured to the cover in such a way tosurround the refrigerant vapor suction conduit, and a liquid separatorlower plate is formed at a lower side of the liquid separator cylinderbody; and a liquid receiver formed in such a way that an upper side ofthe liquid receiver body is secured to both sides of the cover, and anoutlet is formed at a side wall, wherein a plurality of heat pipe bodiesare welded to the liquid separator lower plate, respectively, and theevaporator is disposed in the liquid receiver body, and the condenser isdisposed in the liquid separator, and the exhaust conduit-combinedworking fluid injection conduit is secured to the lower side of the heatpipe bodies, thus making the heat pipe bodies to communicate with eachother, and an inlet portion of the exhaust conduit-combined workingfluid injection conduit is cut and closed after a working fluid isinjected into the heat pipe bodies, respectively, and then the closedportion is pushed into the inner side of the outlet hole.
 2. A liquidreceiver combined with a liquid separator for a refrigeration cycleaccording to claim 1, wherein an inlet side of said exhaustconduit-combined working fluid injection conduit is formed in a spiralshape.
 3. A manufacturing method of a liquid receiver combined with aliquid separator for a refrigeration cycle, comprising: a liquidseparator semi-finished product manufacture step in which a refrigerantvapor suction conduit and a refrigerant conduit are cut, and therefrigerant vapor suction conduit is extended into a cover at an innerside of the cover, and the refrigerant conduit is extended into thecover at an outer side of the cover, and an upper side of a liquidseparator cylinder body is secured to the cover in such a way tosurround the refrigerant vapor suction conduit; a heat pipe manufacturestep in which a center of each heat pipe body is fixedly secured to aliquid separator lower plate, and an exhaust conduit-combined workingliquid injection conduit is connected to a lower side of each heat pipebody in such a way to make the heat pipe bodies to communicate with eachother; a step in which a liquid separator lower plate to which the heatpipe is fixed is secured to a lower side of the liquid separatorcylinder body, and a condenser of each heat pipe body is dispose in theliquid separator cylinder body; a step in which an upper side of theliquid receiver body with an outlet hole at a side wall is secured toboth sides of the cover, and the exhaust conduit-combined working fluidinjection conduit is extended through the outlet hole; and a step inwhich a vacuum generation means is secured to the exhaustconduit-combined working fluid injection conduit, thus vacuuming theheat pipes, and a working fluid is injected into the heat pipe bodies,respectively, and an inlet side of the exhaust conduit-combined workingfluid injection conduit is closed, and the closed inlet side is pushedinto the interior of the liquid receiver body, and then the outlet holeis closed.
 4. A method for manufacturing a liquid receiver combined witha liquid separator for a refrigeration cycle according to claim 3,wherein an exhaust conduit and a working fluid injection branch conduitare installed at an inlet side of the exhaust conduit-combined workingfluid injection conduit, and then valves are installed.
 5. A method formanufacturing a liquid receiver combined with a liquid separator for arefrigeration cycle according to claim 3, wherein an inlet side of theexhaust conduit-combined working fluid injection conduit is freelyflexible.